She has one image in particular which is very good, but could use a little more contrast.

The first thing I did was add a Curves Adjustment Layer and Darkened just the darks.

This however made the mountain behind her too dark. A lot of detail was lost.

I added a nother curves layer and purposefully masked out everything except the mountain (the part in white) that way the new Curves Adjustment Layer would only affect the mountain. I then made the mountain lighter. Notice I also played with the transperancy of the Adjustment Layer. Curves are hard to get just right. I found a range I liked and played with the transparency of the layer to fine tune it.

The next step is to darken the sky. Using another Curves adjustment layer and a mask I darkened only the sky.

Finally I added back some detail into the figure as she was getting washed out

Below is the final image, after corrections.

This would be a great image to add some color to. However before we do this we have to change this from a Black and White image to a color image.

Go to Image/Mode/RGB Color (computer monitors are RGB based, since this is an image meant for the internet we will select RGB color)